US3354100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes prepared from reaction products of polyoxyalkylene polyols and orthoesters
Assignee: Union Carbide Corp
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Filing: 1966-10-03
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Granted: 1967-11-21
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 William C Kuryla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A POLYURETHANE PREPARED BY REACTING: (A) AN ORGANIC POLYISCOYANATE, AND (B) AN ESTER EXCHANGE REACTION PRODUCT HAVING A HYDROXYL NUMBER IN THE RANGE OF ABOUT 20-700 PREPARED BY REACTING IN THE PRESENCE OF AN ACID CATALYST AT A TEMPERATURE OF ABOUT 35*-120*C. FOR ABOUT 0.5-24 HOURS: (I) A POLYOXYALKYLENE POLYOL HAVING FROM 2 TO 8 HYDROXYL GROUPS WHEREIN THE OXYALKYLENE GROUPS THEREOF HAVE FROM 2 TO 4 CARBONS ATOMS, AND, (II) AN ORTHOESTER OF THE FORMULA:
Claim 2
Dependent Claim
76 words
A POLYURETHANE PREPARED BY REACTING: (A) AN ORGANIC POLYISCOYANATE, AND (B) AN ESTER EXCHANGE REACTION PRODUCT HAVING A HYDROXYL NUMBER IN THE RANGE OF ABOUT 20-700 PREPARED BY REACTING IN THE PRESENCE OF AN ACID CATALYST AT A TEMPERATURE OF ABOUT 35*-120*C. FOR ABOUT 0.5-24 HOURS: (I) A POLYOXYALKYLENE POLYOL HAVING FROM 2 TO 8 HYDROXYL GROUPS WHEREIN THE OXYALKYLENE GROUPS THEREOF HAVE FROM 2 TO 4 CARBONS ATOMS, AND, (II) AN ORTHOESTER OF THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |